xenl

html_orig/js/app.js

@@ -1562,7 +1562,8 @@ var Screen = (function () {
 		bg: 0,
 		attrs: 0,
 		suppress: false, // do not turn on in blink interval (for safe moving)
-		hidden: false    // do not show
+		hidden: false,    // do not show
+		hanging: false,   // xenl
 	};
 
 	var screen = [];
@@ -1595,6 +1596,7 @@ var Screen = (function () {
 
 	/** Update cell on display. inv = invert (for cursor) */
 	function _draw(cell, inv) {
+		if (!cell) return;
 		if (typeof inv == 'undefined') {
 			inv = cursor.a && cursor.x == cell.x && cursor.y == cell.y;
 		}
@@ -1696,7 +1698,8 @@ var Screen = (function () {
 		clearInterval(blinkIval);
 		blinkIval = setInterval(function () {
 			cursor.a = !cursor.a;
-			if (cursor.hidden) {
+			// TODO try to invent a new way to indicate "hanging" - this is copied from gtkterm
+			if (cursor.hidden || cursor.hanging) {
 				cursor.a = false;
 			}
 
@@ -1755,6 +1758,8 @@ var Screen = (function () {
 		cursor.fg = num & 0x0F;
 		cursor.bg = (num & 0xF0) >> 4;
 		cursor.hidden = !(num & 0x100);
+		cursor.hanging = !!(num & 0x200);
+		// console.log("Attributes word ",num.toString(16)+'h');
 
 		fg = cursor.fg;
 		bg = cursor.bg;
@@ -1803,6 +1808,11 @@ var Screen = (function () {
 		}
 
 		_drawAll();
+
+		if (!cursor.hidden || cursor.hanging) {
+			// hide cursor asap
+			_draw(_curCell(), false);
+		}
 	}
 
 	function _load_labels(str) {

html_orig/jssrc/term.js

@@ -10,7 +10,8 @@ var Screen = (function () {
 		bg: 0,
 		attrs: 0,
 		suppress: false, // do not turn on in blink interval (for safe moving)
-		hidden: false    // do not show
+		hidden: false,    // do not show
+		hanging: false,   // xenl
 	};
 
 	var screen = [];
@@ -43,6 +44,7 @@ var Screen = (function () {
 
 	/** Update cell on display. inv = invert (for cursor) */
 	function _draw(cell, inv) {
+		if (!cell) return;
 		if (typeof inv == 'undefined') {
 			inv = cursor.a && cursor.x == cell.x && cursor.y == cell.y;
 		}
@@ -144,7 +146,8 @@ var Screen = (function () {
 		clearInterval(blinkIval);
 		blinkIval = setInterval(function () {
 			cursor.a = !cursor.a;
-			if (cursor.hidden) {
+			// TODO try to invent a new way to indicate "hanging" - this is copied from gtkterm
+			if (cursor.hidden || cursor.hanging) {
 				cursor.a = false;
 			}
 
@@ -203,6 +206,8 @@ var Screen = (function () {
 		cursor.fg = num & 0x0F;
 		cursor.bg = (num & 0xF0) >> 4;
 		cursor.hidden = !(num & 0x100);
+		cursor.hanging = !!(num & 0x200);
+		// console.log("Attributes word ",num.toString(16)+'h');
 
 		fg = cursor.fg;
 		bg = cursor.bg;
@@ -251,6 +256,11 @@ var Screen = (function () {
 		}
 
 		_drawAll();
+
+		if (!cursor.hidden || cursor.hanging) {
+			// hide cursor asap
+			_draw(_curCell(), false);
+		}
 	}
 
 	function _load_labels(str) {

user/ansi_parser_callbacks.c

@@ -284,7 +284,7 @@ apars_handle_CSI(char leadchar, int *params, int count, char keychar)
 				int n = params[i];
 
 				if (n == 0) { // reset SGR
-					screen_reset_cursor(); // resets colors, inverse and bold.
+					screen_reset_sgr(); // resets colors, inverse and bold.
 				}
 				else if (n >= 30 && n <= 37) screen_set_fg((Color) (n - 30)); // ANSI normal fg
 				else if (n >= 40 && n <= 47) screen_set_bg((Color) (n - 40)); // ANSI normal bg

user/screen.c

@@ -40,6 +40,8 @@ static Cell screen[MAX_SCREEN_SIZE];
 static struct {
 	int x;    //!< X coordinate
 	int y;    //!< Y coordinate
+	bool hanging; //!< xenl state
+
 	bool autowrap;   //!< Wrapping when EOL
 	bool insert_mode; //!< Insert mode (move rest of the line to the right)
 
@@ -65,6 +67,8 @@ static struct {
 static struct {
 	int x;
 	int y;
+	bool hanging; //!< xenl state
+
 	// mark that attrs are saved
 	bool withAttrs;
 	u8 attrs;
@@ -89,6 +93,8 @@ static volatile int notifyLock = 0;
 							if (notifyLock == 0) screen_notifyChange(CHANGE_CONTENT); \
 						} while(0)
 
+#define clear_invalid_hanging() do { if (cursor.hanging && cursor.x != W-1) cursor.hanging = false; } while(false)
+
 /**
  * Restore hard defaults
  */
@@ -162,15 +168,16 @@ cursor_reset(void)
 
 	cursor.x = 0;
 	cursor.y = 0;
+	cursor.hanging = false;
 	cursor.fg = termconf_scratch.default_fg;
 	cursor.bg = termconf_scratch.default_bg;
-	cursor.visible = 1;
-	cursor.autowrap = 1;
-	cursor.attrs = 0;
-	cursor.insert_mode = 0;
+	cursor.visible = true;
+	cursor.autowrap = true;
+	cursor.attrs = false;
+	cursor.insert_mode = false;
 
-	cursor.kp_alternate = 0;
-	cursor.curs_alternate = 0;
+	cursor.kp_alternate = false;
+	cursor.curs_alternate = false;
 
 	cursor.charset0 = 'B';
 	cursor.charset1 = '0';
@@ -208,7 +215,7 @@ screen_reset(void)
  * Reset the cursor
  */
 void ICACHE_FLASH_ATTR
-screen_reset_cursor(void)
+screen_reset_sgr(void)
 {
 	cursor.fg = termconf_scratch.default_fg;
 	cursor.bg = termconf_scratch.default_bg;
@@ -475,6 +482,7 @@ screen_cursor_set(int y, int x)
 	if (y >= H) y = H - 1;
 	cursor.x = x;
 	cursor.y = y;
+	clear_invalid_hanging();
 	NOTIFY_DONE();
 }
 
@@ -497,6 +505,7 @@ screen_cursor_set_x(int x)
 	NOTIFY_LOCK();
 	if (x >= W) x = W - 1;
 	cursor.x = x;
+	clear_invalid_hanging();
 	NOTIFY_DONE();
 }
 
@@ -521,6 +530,13 @@ screen_cursor_move(int dy, int dx, bool scroll)
 	NOTIFY_LOCK();
 	int move;
 
+	clear_invalid_hanging();
+
+	if (cursor.hanging && dx < 0) {
+		dx += 1; // consume one step on the removal of "xenl"
+		cursor.hanging = false;
+	}
+
 	cursor.x += dx;
 	cursor.y += dy;
 	if (cursor.x >= (int)W) cursor.x = W - 1;
@@ -549,6 +565,7 @@ screen_cursor_save(bool withAttrs)
 {
 	cursor_sav.x = cursor.x;
 	cursor_sav.y = cursor.y;
+	cursor_sav.hanging = cursor.hanging;
 
 	cursor_sav.withAttrs = withAttrs;
 
@@ -572,6 +589,7 @@ screen_cursor_restore(bool withAttrs)
 	NOTIFY_LOCK();
 	cursor.x = cursor_sav.x;
 	cursor.y = cursor_sav.y;
+	cursor.hanging = cursor_sav.hanging;
 
 	if (withAttrs) {
 		cursor.fg = cursor_sav.fg;
@@ -628,17 +646,20 @@ screen_set_bg(Color color)
 	cursor.bg = color;
 }
 
-void screen_attr_enable(u8 attrs)
+void ICACHE_FLASH_ATTR
+screen_attr_enable(u8 attrs)
 {
 	cursor.attrs |= attrs;
 }
 
-void screen_attr_disable(u8 attrs)
+void ICACHE_FLASH_ATTR
+screen_attr_disable(u8 attrs)
 {
 	cursor.attrs &= ~attrs;
 }
 
-void screen_inverse_enable(bool ena)
+void ICACHE_FLASH_ATTR
+screen_inverse_enable(bool ena)
 {
 	cursor.inverse = ena;
 }
@@ -652,35 +673,40 @@ void screen_inverse_enable(bool ena)
  * @param x
  * @return OK
  */
-bool ICACHE_FLASH_ATTR screen_isCoordValid(int y, int x)
+bool ICACHE_FLASH_ATTR
+screen_isCoordValid(int y, int x)
 {
 	return x >= 0 && y >= 0 && x < W && y < H;
 }
 
-
-void ICACHE_FLASH_ATTR screen_set_charset_n(int Gx)
+void ICACHE_FLASH_ATTR
+screen_set_charset_n(int Gx)
 {
 	if (Gx < 0 || Gx > 1) return; // bad n
 	cursor.charsetN = Gx;
 }
 
-void ICACHE_FLASH_ATTR screen_set_charset(int Gx, char charset)
+void ICACHE_FLASH_ATTR
+screen_set_charset(int Gx, char charset)
 {
 	if (Gx == 0) cursor.charset0 = charset;
 	if (Gx == 1) cursor.charset1 = charset;
 }
 
-void ICACHE_FLASH_ATTR screen_set_insert_mode(bool insert)
+void ICACHE_FLASH_ATTR
+screen_set_insert_mode(bool insert)
 {
 	cursor.insert_mode = insert;
 }
 
-void ICACHE_FLASH_ATTR screen_set_keypad_application_mode(bool app_mode)
+void ICACHE_FLASH_ATTR
+screen_set_keypad_application_mode(bool app_mode)
 {
 	cursor.kp_alternate = app_mode;
 }
 
-void ICACHE_FLASH_ATTR screen_set_cursor_application_mode(bool app_mode)
+void ICACHE_FLASH_ATTR
+screen_set_cursor_application_mode(bool app_mode)
 {
 	cursor.curs_alternate = app_mode;
 }
@@ -693,7 +719,8 @@ screen_putchar(const char *ch)
 {
 	NOTIFY_LOCK();
 
-	Cell *c = &screen[cursor.x + cursor.y * W];
+	// clear "hanging" flag if not possible
+	clear_invalid_hanging();
 
 	// Special treatment for CRLF
 	switch (ch[0]) {
@@ -707,23 +734,27 @@ screen_putchar(const char *ch)
 
 		case 8: // BS
 			if (cursor.x > 0) {
+				if (cursor.hanging) {
+					cursor.hanging = false;
+				} else {
 					cursor.x--;
 				}
+			}
 			// we should not wrap around
 			// and apparently backspace should not even clear the cell
 			goto done;
 
 		case 9: // TAB
-			// TODO change to "go to next tab stop"
-			if (cursor.x<((W-1)-(W-1)%4)) {
-				c->c[0] = ' ';
-				c->c[1] = 0;
-				c->c[2] = 0;
-				c->c[3] = 0;
-				do {
-					screen_putchar(" ");
-				} while(cursor.x%4!=0);
-			}
+//			// TODO change to "go to next tab stop"
+//			if (cursor.x<((W-1)-(W-1)%4)) {
+//				c->c[0] = ' ';
+//				c->c[1] = 0;
+//				c->c[2] = 0;
+//				c->c[3] = 0;
+//				do {
+//					screen_putchar(" ");
+//				} while(cursor.x%4!=0);
+//			}
 			goto done;
 
 		default:
@@ -734,6 +765,25 @@ screen_putchar(const char *ch)
 			}
 	}
 
+	if (cursor.hanging) {
+		// perform the scheduled wrap if hanging
+		// if autowrap = off, it overwrites the last char
+		if (cursor.autowrap) {
+			cursor.x = 0;
+			cursor.y++;
+			// Y wrap
+			if (cursor.y > H - 1) {
+				// Scroll up, so we have space for writing
+				screen_scroll_up(1);
+				cursor.y = H - 1;
+			}
+
+			cursor.hanging = false;
+		}
+	}
+
+	Cell *c = &screen[cursor.x + cursor.y * W];
+
 	// move the rest of the line if we're in Insert Mode
 	if (cursor.x < W-1 && cursor.insert_mode) screen_insert_characters(1);
 
@@ -758,19 +808,9 @@ screen_putchar(const char *ch)
 	cursor.x++;
 	// X wrap
 	if (cursor.x >= W) {
-		if (cursor.autowrap) {
-			cursor.x = 0;
-			cursor.y++;
-			// Y wrap
-			if (cursor.y > H - 1) {
-				// Scroll up, so we have space for writing
-				screen_scroll_up(1);
-				cursor.y = H - 1;
-			}
-		} else {
+		cursor.hanging = true; // hanging - next typed char wraps around, but backspace and arrows still stay on the same line.
 		cursor.x = W - 1;
 	}
-	}
 
 done:
 	NOTIFY_DONE();
@@ -1000,7 +1040,9 @@ screenSerializeToBuffer(char *buffer, size_t buf_len, void **data)
 		encode2B((u16) (
 				cursor.fg |
 				(cursor.bg<<4) |
-			(cursor.visible ? 1<<8 : 0))
+				(cursor.visible ? 1<<8 : 0) |
+				(cursor.hanging ? 1<<9 : 0)
+			)
 			, &w5);
 
 		// H W X Y Attribs

user/screen.h

@@ -153,7 +153,7 @@ void screen_cursor_set_x(int x);
 /** Set cursor Y position */
 void screen_cursor_set_y(int y);
 /** Reset cursor attribs */
-void screen_reset_cursor(void);
+void screen_reset_sgr(void);
 /** Relative cursor move */
 void screen_cursor_move(int dy, int dx, bool scroll);
 /** Save the cursor pos */